4 comments:

The robocopy /IPG parameter specifies the inter-packet gap in milliseconds. The formula above inserts a full 2.048 seconds between each packet. In order to determine mathematically what the bandwidth utilization of a transfer that sends a single packet every 2 seconds is we would need to know what the packet size (MTU) is. To use the most common scenario let's use 1500 bytes, or (8*1500)=12,000 bits. If we are sending a single packet every 2 seconds then we are transferring at a rate of 12,000/2 or 6Kbps, not 200Kbps. And the fact that MTU is not even a factor in the formula tells me that it can't possibly be valid.

Actually the formula is correct because the value 512 in the above formula indicates a 64KB packet which is the size that robocopy uses. This was not stated in the explanation, but it is accounted for.